If anything, the trickle down effect from the 787s will allow CLE to get more long haul flights and perhaps relieve some of the congestion at EWR. I think the 787s will be placed on some of current and proposed Asia flights which will in turn free up 777s which will in turn free up 767s that could be used in CLE (HNL, AMS, CDG, TLV come to mind, but not all on a daily schedule).